Giuseppe pavia



Patented Apr'. 4, |899.

G. PAVIA.

JACQUARD MECHANISM FOR LUOMS.

(Application led Sept. 11, 1897.)

(No Model.)

TN: Dams ness co, PHm'o-LTHO.. msHmcToN. D. c.

other.

ilivrrnn STATES PATENT Finca.

GIUSEPPE PAVIA, OF PATERSON, NEW JERSEY, ASSIGNOR TO JAMES JACKSON & SONS, OF SAME PLACE.

JACQUARD MECHANISIVI F-OR LOOMS.

SPECIFICATION forming part of Letters Patent No. 622,257, dated April 4, 1899.

Application filed September 11,1897. Serial No. 651,320. (No model.)

To @ZZ wiz/0m it may concern.'

Beit known that I, GIUSEPPE PAVIA, a citi- Zen of the Kingdom of Italy, residing at Paterson,'in the county of Passaic and State of New Jersey, have invented certain new and useful Improvements in' Jacquard Mechanisms for Looms; and I do hereby declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this speciiication.

My invention relates toimproving the means for moving the upper and lower grates or griffs in a rise-and-fall jacquard to and from each In order to accomplish this object, I apply the well-known eccentric principle as it is used in any double-acting engine,where a simultaneous up-and-down motion is required and created by having two double cranks and by making the second double crank a single crank, inasmuch as in this instance there are only two levers requiring motion. It will, however, readily be understood that a third lever and corresponding crank could be added, which would be onlya multiplication of my original idea.

In describing my invention I shall call attention to the accompanying drawings,where in like letters of reference indicate corresponding parts in the different views, and wherein- Figure l shows a side view of a jacquard mechanism with only the necessary elements shown to embody my invention, and Fig. 2 an end view of part of Fig. 1.

A indicates in Fig. l the frame of the jacquard; B,the upper grate or griff; O,thelower grateor griff; D, one of the upper-griff vertical elevatingbars; E, one of the lower-griff vertical elevating-bars; D', the upper-griff motion-lever; D2, one of the upper-griff connectin g-rods E', the lower-griff motion-lever, and E2 one of the lowergriff connecting-rods, each of which pairs of connecting-rods D2 D2 and E2 E2 being by suitable mechanical means connected, respectively, with the motion-levers andthe upper and lower grates. The motionlevers D' and E are pivotedin the standard F at the fulcrums Gand I-I, and the means, furnishing them' with the required up-and-down motion, which, on account of the said fulcrums located in the standard, will be transmitted to the respective griffs with which they connects the rod K with the crank-pin M' of the crank M on the shaft N. The strap L is formed of two parts L' and L2, of which L' has the connecting-rod K attached to it and is constructed so as to be able to perform a telescopic movement in combination with LQ-that is, slide up and down in a guideway cut out in L2, to which part it is attached by screws L3 and L4. This telescopic adjustment will easily be recognized as permitting a shortening or lengthening of the up-and-down movement of the arm I, and consequently also of the lower griff C. The shaft N, which is mounted in appropriate bearings at O and P, has secured to it, as before stated, the double crank M, having a crank-pin M', of which the arm M2 has adisk Q secured to it. Attached to said disk is an arm R, having a slot R', through which slot pass bolts R2 and' Rtwhich bolts, passing through any of the desired holes R4 in the disk Q for that purpose made and provided, secure the arm R to the disk Q. It will be seen that by means of the slot R' furnished in the arm R and the holes R4 in the disk Q the eccentricity of a pin S, attached to the arm R, can be increased or decreased, as required. The said pin S represents the free pin of the second crank, as alluded to in my preamble above,

and virtually represents, in connection with the arm R and the disk Q, an adjustable eccentric motion. This motion is transmitted to the arm J of the motion-lever D' in substantially the same manner as the motion from the crank M is transmitted to the arm I of the motion-lever E'. The strap T can regulate the length of the up-and-down movement of ythe motion-lever J by being composed IOO of two pieces T' and T2, Tl being able to slide in T2 and being secured to it by screws T3 and T4, as in the instance of the strap L. The con necting-rod U has one end attached to the part T and the other end pivoted between the arms V and V2 of the knuckle-joint V, which is pivoted to the clamp WV, attached to the arm J by the set-screw W.

Vhen the necessary revolving motion is inally given to the shaft N by appropriate mechanical 1neans,the movement Will,through the above-described means, be transferred to the upper and lower griffs and can by the adjustable means formed at different points easily be regulated, so that the herein-described double and single crank motion as applied to a jacquard will be found practical and time and labor saving, which was the desired object I had in view.

Various elements, such as the straps L and T and the combination of the disk Q and the crank-arm R attached thereto, can be modiied by a different construction in detail without disturbing the principle of my invention, for- What I claim, and desire to secure protection for by Letters Patent, is

l. The combination in a rise-and-fall jacquard mechanism of the upper and lower grift` frames, the vertical elevating-bars attached to said grits, the motion-levers, the connecting-links attaching the respective motion-levers to the vertical griff-elevating bars, with a crank-shaft having a double and single crank, a perforated disk having an adjustable arm attached forming the single crankarm with a crank-pin attached thereto, telescopic straps secured to the crank-pins, connectingrods, pivotal knuckle -joints and clamps connecting the crank-pins with their respective motion-levers for the purposes set forth, substantially as described.

2. The combination in a rise-and-fall jacquard mechanism of the upper and lowergrii frames, the vertical elevating-bars attached to said grifs, the motion-levers, the connecting-links attaching the respective motion-levers to the vertical grid-elevating bars; with a crank-arm having its piu connected to one of the said motion-levers; an arm connected to the other motion-lever, means for adjusting said arm to different positions around the axis of the crank-pin and for securing it in position after adjustment all for the purposes as set forth, substantially as described and illustrated.

In testimony that I claim the foregoing I have hereunto set my hand this 8th day of September, 1897.

GIUSEPPE PAVIA.

lVitnesses:

AUGUST M. TRESCHOW, CESARE CAsARICo. 

